Eli5 what would happen if you had water in a completely sealed container and brought it past boiling temp

Question

Would it just turn into a pressurized container full of steam? Would the water stay water but just like, really hot?

In: 98

Answer 1

Steam would collect in the top of the bottle and push down on the water causing pressure to rise as well as the boiling point… this would keep happening until one of three things happened:

1. The container breaks

2. The water reaches the same temp as the heating element at a high pressure.

3. All the water turned to steam and the steam would heat up then to the heating element temp at high pressure

This concept is used in pressurized water reactors. If you read up on presurizer operations in thermonuclear pressurized water reactors you will get indepth views into all the complexities of this situation.

I spent years as a reactor operator on a 550MW nuclear reactor.